981085869629 has 2 divisors, whose sum is σ = 981085869630. Its totient is φ = 981085869628.

The previous prime is 981085869601. The next prime is 981085869637. The reversal of 981085869629 is 926968580189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551113216900 + 429972652729 = 742370^2 + 655723^2 .

It is a cyclic number.

It is not a de Polignac number, because 981085869629 - 2⁸ = 981085869373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981085869329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490542934814 + 490542934815.

It is an arithmetic number, because the mean of its divisors is an integer number (490542934815).

Almost surely, 2^981085869629 is an apocalyptic number.

It is an amenable number.

981085869629 is a deficient number, since it is larger than the sum of its proper divisors (1).

981085869629 is an equidigital number, since it uses as much as digits as its factorization.

981085869629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134369280, while the sum is 71.

The spelling of 981085869629 in words is "nine hundred eighty-one billion, eighty-five million, eight hundred sixty-nine thousand, six hundred twenty-nine".